Lamp-socket.



W. F. ANKLAM. LAMP SOCKET.

APPLICATION FILED AUG-31. 1914.

Patented Sept. 14, 1915.

I VEIV T 0/? \QHM mm? ammm WITNESSES:

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WILLIAM F. ANKLAIVI, F DETROIT, MICHIGAN, 'ASSIGNOR TO 0. M. HALL LAMP COMPANY, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

LAMr-socman master,

To all whom it may concern:

Be it @own that 1, WILLIAM F. ANKLAM,

a citizen of the United States of America,

I as employed for the holding of incandescent lamp-bulbs in vehicle lamps, and the invention has particular reference to the construction providing for longitudinal adjustment of the socket in focusing.

In the drawings5-Figure 1 is a plan view of the blank from which the socket is formedpFig. 2 is a perspective View of the completed bulb-holding socket; Fig. 3 is a perspective view showing the lamp, the holding socket therefor, and the outer socket in which said holding socket is longitudinally adjustable; Fig. a is a cross-section through Fig. 3; and Fig. 5 is a longitudinal section therethrough.

A is a. sheet metal blank which is provided at one end with a plurality of bayonet joint slots B and also preferably with spring tongues C.

D D are projections from the sides of the blank, the latter being notched or serrated at its edge. Y

As shown in Fig. 2 the blank A is bent to form a cylinder E, and the projections D D are bent to extend radially outward, forming longitudinally-extending flanges.

F is an outer socket of a diameter to telescopically receive the socket E and permit the longitudinal sliding thereof.

G is a laterally-extending flange on the socket F, which is apertured at H for the passage of the flange D and is provided at one side of saidiaperture with an inclined dge I for engagement with the notches in he flange D.

J isa spring preferablv formed of a U- shaped wire secured at K to the flange G and having its free end laterally bent at L to form a bearing upon the flange D.

As shown in Figs. 1 and 5, when the sock- Specification of Letters Patent. Patqgnt ed gept 14 1915, .ttpplication filed August 31, 1914. Serial No. 859,434.

ets E and F are engagement the tension of the spring J will normally press the notched flange D into engagement with the inclined edge I of the aperture H and this socket for focusing, a slight rotation thereof Wlll compress the spring J and withdraw the notched edge of the flange D from the incline I so as to permit a free longitudinal adjustment of the inner socket. When suitably ad usted the inner socket is released and by the tension of the spring J will again be rotated to look the notched flange D with the edge I.

What I claim as my invention is 1. A lamp socket, comprising a tubular member formed from a sheet metal blank, havin a longitudinal serrated edge portion extended radially outward, a second tubular member telescopically engaging the first named member-and maintaining. the longitudinal edges thereof adjacent, a flange transversely formed upon the outer member having an edge en ageable with .the serrations of said radially extended edge portion through relative rotation of the two cylindrical' members, and'a spring mounted .upon

one of said cylindrical members exerting a rotative force upon the other, tending to maintain the said edge of the transverse flange engaged with said serrations.

2. A lamp socket, comprising telescopically engaged cylindrical members, a longitudinally extending flange on one of said members, a transversely-extending flange upon the other member apertured for the passage of said longitudinal flange, an edge of the aperture being sharpened and a spring secured to the front, surface of the transverse flange, bearing upon the longitudinal flange, tending to maintainthe latter pressed against said sharpened edge.

3. A lamp socket. comprising telescopically engaged cylindrical members, the inner one being formed from a sheet metal blank, a longitudinally extending flange upon the inner member proiecting throughan opening in the outer memr, and formed by contiguous portions of the member which In testimony whereof I aFfiX my signature projected laterally from opposite edges of in presence of two Witnesses.

the original blank, and a knife edged mem- WILLIAM F. ANKLAM ber carried by the outer cylindrical mem- 5 her, normally engaged by the longitudinal Witnesses:

flange of the cylindrical member, the latter HERBERT APFELLBAUM', being revoluble to disengage the two flanges. C. E. ALLEN. 

